US1464020A - Woodworking machine - Google Patents

Description

Aug. 7, 1923. 1,464,020

' c. F. ANDERSONET AL Y wol'qwoRmNG MACHINE Filed Oct. 24,. 1919 '7 Sheets/-Sheet l gfgg o 7gg? la je Il* i I; um 65 f1i o f i; "Alli E gaf Q i M N C? 1, w' 5' 1 M sja a y @j QQ 1E Q93 EQ2' NIW.

1 i 'l O AM 65 o o0 En. j

950 4 @Taten/@rs Y 1 CCUQDLWSQ@ I j 1 P' Lfd@ 713 mi) jglgi 1 Q55] wmrw/w o` l. @20mm/g5 Aug. 7, 1923.

1,464,020 c. F. ANDERSON ET AL wo'oDwoRKlNG MACHINE Filed Oct. 24 1919 '7 sheets-sheet 2 @Hamme/16 Aug. 7, 1923.

C. F. ANDERSON ET AL.

wo'oDwoRKING MACHINE C. F. ANDERSON ET AL.

wooDwoRKING MACHINE Filed Oct. 24 1919 '7 Sheets-Sheet 4 IiIL W imm, www@ b n Ww HMZD www, mm w @www Aug.. 7, 1923.

' 1,464,020 c. F. ANDERSON ET M WOODWORKI'NG MACHINE Filed Oct. 24 1919 '7 Sheets-Sheet 5 l IEE l] Aug. 7; 1923. 1,464,020

C. F. ANDERSQN ET AL WOODWORKING MACHINE Filed Oct. 2 4 1919 7 Sheets-Sheet 6 c. F. ANDERSQN ET All.

WOODWORKING MACH INE Filed Oct, 24 1919 7 Sheets-Sheet 7 Ruf/n0 j 35 Cavi@ 215022/ Patented Aug. 7, 19Z3 untreuN CARL r. annui-tecn, or nnooirrrnnn, Ann inneren W. nner?, or ientawrn, inni-ners, Assrenons, BY ransnn Assronnnnrs, ro sonnen oonronarron, or orcnno, immers, A conroue'ro'v or rumors.

WCODDRKING lEACHINE.

application inea' october 2e, 191e. seran no. 332,953.

l@ the following is a tull, clear, concise, and

exact description, reference being` hadto the accompanying` drawings, forming a part of this speciiication.

@ur invention pertains to a'wood-work' l ing machine.

The present construction of machine is designed primarily Jfor making Washingmachine cylinder slats but it will be apparent from the appended detail description ot the functions and operations ot the machine,

that the essential features ot the invention are not ot necessity limitedL to a machine for the making,` of these slats, but that they may be extended to and embodied in machines for making other articles of analogous form,

or even articles ot dissimilar form, but which require the performance ot substantially the same operations in whole or in part. It will, therefore, be understood that though we have described the present ma` chine as a special work machine, designed for the n'iaking ot washing machine cylinder slats, ve do not intend thereby to limit the invention to any specific field ot'utility, at

least in so tar as the particular form of product of the machine is concerned.

The primary object of the present invention is to provide a machine of the above type which will iliertorm with the assistance of merely one or two operators a series ot woodworking operations heretofore requiringseveral machines and numerous employees.

A secondary object of the invention is to provide a machine which will manufacture these slats with great rapidity, by 'reducing to a minimum the number of operations required per Slat. This we accomplish by the novel method of performing each operation in turn upon a rela-tively large blank, preterably the size oit a plurality of finished slats, and then a final operation cutting` this blank into a plurality of completed slat units.

Another object of the hinvention is to provide a woodfworking,` machine wherein the wood-working elements can be quickly and easily adjusted for the purpose ot readily adapting the machine to the production of diiierent sizes or slats or slats of diii'erent characteristics.

rihe construction and operation of a preferred embodiment of our invention will be more apparent from the following` ydetailed description taken in connection with the accompanying drawings, in which:

Figure l is a top plan view oit' the finished cylinder slat S. f

Figure 2 is an end view of the same;

Figure 3 is a top plan view of the longer length of sla-t S adapte-d for useV in the cylinder covers;

Figure l is a plan view of the blank Figure 5 is an end view thereof;

Figure 6 is a plan view of the machine, showing` the countersl'iaft and the driving connections with the machine;

Figure 7 is a trent elevational view of the machine;

Figure 8 is an enlarged rplan view ot the same with the boring` mechanism removed; Figure 9 is a vertical sectional view taken transversely through the machine; Figure i0 is a detail section of the spring connection in the connecting rod of the feeding;- cross-head.

Figure l1 is a detail section illustratingV the mounting ot' the compressed air valve for the cleaning` jet.

Figure 12 is a vertical,fragmentary, sectional view taken approximately on the li 12-`l2 of Figure 8 and looking forwardly as indicated by tlie`aifioivs. A

Figure i3 is an enlarged detail section tak en on the line i341?) in Figure 12;

Figure I/i is an enlarged elevational vieri' of the boring; mechanism;

n LAV the same, illustrating the small, laterally Figure i5 is a fragmentary end View ot of the use and form of the slats which constitute the product of the machine.

The present form of slat is utilized in the making of clothes containers, such as are employed in rotary container types of domestic washing machines. These clothes containers are generally constructed in cylindrical form and usually consist of two substantially circular end heads which are joined by a plurality of cross slats spaced uniformly about the circumference of the heads. A cylinder of average size requires in the neighborhood of thirty slats, and it will hence be apparent that it is essential that the cost of the production'of these slats be reduced to -a minimum. According to the prior practice, these slats have been con- `'application ASerial No. 318,080, filed August In Figures 1 and 2 of the accompanying drawings we have shown the shorter length of slat s for the making up of the circumference of the cylinder. Along the length' of the slat are bored a plurality of relatively large holes 18, numbering in the present instancel, whichprovide openings for circuiatinel the wash water through the slats. At each end `there are also bored two small nail holes 19 Vfor the insertion of the brads or nails by which the slats are secured to the end heads of the cylinder. As shown in the end view of Figure 2, one surface of the slat is substantially flat, as indicated at 20, while the reverse surface is concave, as indicated at 21. The degree of curvature of the concave surface is shown exaggerated to be more apparent in the small ligure. The radius of the concavity 21 is made substantially that of the radius of the cylinder heads so as to secure full surface contact of these slats on the cylinder heads. The lateral edges of the flat surface 2O are beveled or rounded as denoted at 22, as are also the end edges as denoted at 23, so as to present smooth exterior corners on the sides and ends of the slats.

Figure 3 illustrates the longer length of Y -slat s" utilized in the making of the cylinlder covers. This form of slat is a practical duplicate of the shorter length s, with the exception of the dierence of lengths, which are' substantially in *the proportion illusdriving dierent operating trated,--and also in the difference of location ofthe nail holes 19. It is also preferable in this type of slat to reduce the number of water circulating holes to seven, for reasons involved in the construction of the cylinder covers. It will be noted that in the cover slot s the nail holes 19 are located considerably short of the ends of the slats. rIhis difference of location of the nail holes is for thepurpose of nailing these cover slats to the transverse cleat members forming the frame of the cover, which are usually spaced inwardly from the end heads of the cylinder.

The stockmaterial of which these slats are constructed is fed to the machine in the form of blanks o, of the formation shown in Figures l and 5. The blank is preferably slightly longer than either slat and is trimmed to length in the machine as we shall hereinafter describe. It is, of course, practicable to cut these blanks to precisely the length of the finished slat before feeding to the machine, but this practice is not as efiicient and rapid and does not afford the same measure of accuracy for the reason that undersized blanks are liable to result. The blank is substantially twice the thickness of the finished slat, and is hollowed on its upper and lower surfaces as indicated at 21, to provide the concave under surface 21 of the finished slat. The blanks are also formed with rounded' V-shaped moulding grooves 25 extending along the side edges of the blank in the median plane thereof. The blank is adapted to be slit along this plane which is denoted by the line -fa after the completion of the several operations thereon, and the rounding bevels in these moulding grooves are what form the beveled corners 22 of the finished slate.

lReferring now to the detail construction of the machine, the supporting structure 3() (Figure 7) comprises three front supporting` legs consisting of the pair of similar legs 31-31 and the relatively shorter leg 32. These three front legs in conjunction with the two central standards or uprights 3,V which project upward considerably above the front legs (Figures 8 and 9) form a horizontal bed or working surface of open frame construction upon which are sup-r ported all of the wood working elements. The legs 31 and 32V and standards 33 are joined by the horizontal cross timbers 34 and 35, the upper timbers 34 completing the open frame bed or working surface.V In the rear of the standards 88 are disposed a plurality of supporting legs 36 to which the cross tim-' i bers 34 and 35 are extended and joined for the purpose of forming a supporting structure 37 for supporting the counter-shaft and other power transmission mechanism for parts ofthe machine.

raeaoeo 8 |The blanks are fed into a narrow vertical hopper consisting of the front and rear plates 38, which are secured between the two front legs 31. From the hopper 38, the blanks| are discharged onto two horizontal guide members 39, (Figure 9). These guide members are mounted at theirrear ends in a narrow plate or bar 41, suitably secured to the frame of the machine, and are mounted at their front ends in a marginal strip 4-2 depending from the edge of the projecting ledge or shelf 43. Reciprocating beneath the hopperr 38 is a feeding plate or cross-head 44, having semi-circular slides 45 which have guiding engagement on the guide rails 39. This cross-head is recipro` cated by a pitman or connecting rod 46 which has pivotal connection to a bea-ring 47 depending from the bottom of the crosshead 44. The connecting rod 46 has pivotal connection to a crank wheel 48 which is mounted on a slow speed counter-shaft 49. As shown in Figure 16, the countershaft 49 is geared down through a double reduction gearing from the main power shaft 51, which has bearing support in the rear frame structure 37 and extends parallel to the counter-shaft 49. The double reduce tion gearing comprises the large gear 52 on the countershaft 49,- the small gear 53 on the power shaft 51, and the intermediate double gear, consisting of the large and small gears 54- and 55 respectively, which are mounted on a stub shaft 56, carried on the frame standard 57 (Figure 9). The power shaft 51 carries a driving pulley which drives the power shaft 5l through the intervention of a clutch 59. The operation of throwing this clutch in and out is effected by a long operating lever 61, which extends horizontally7 to a convenient posi-- tion for operation at the front of the machine as illustrated in Figure 8. The pulley 58 is connected by a belt 62 to a smaller pulley 63 on the motor driven counter shaft 64 (Figure 6). rllhe counter shaft is preferably located at the rear of the machine where it is supported' in bearings 65, and is belted to a power motor 66.

Referring again to the illustration in Figure 9 of the crosshead 44, it will be noted that this cross head has motion in under the shelf 43, so as to enable the feed ing edge of the cross-head to clear the dis-- charge end of the chute or hopper 38. When this occurs the lowermost blank 7) drops upon the guide rails 39, where it is engaged by the cross-head 44 on its return motion and is fed forwardly between two ro tary crosscut saws 71 and 71. These rotary saws are mounted on a common shaft 72, which extends transversely above the guiderails 39 and has bearing support in bean ings 7 3 and 7 3 onv the frame of the machine as shown in Figure 8. The shaft 72 is pio yshaft 82 by the nut 87.

shiftable hub 78 is splined to the shaft 72 and is adapted to be rigidly held in any adjusted position by a set screw 79 or similar means. Thefunction of the two rotary saws 71-71 is to trim oft' the ends of the blanks ZJ to cut the blanks down to the exact lengths desired for the linished slats. As we have previously described, two distinct lengths of slats are required, one length for completing the clothes cylinder and the other length for forming the cylinder cover. rEhe cutting of these two types of slats of different lengths is provided for by the longitudinal adjustment of the rotary saws 71 and 71 on their common shaft 72. Each type of slat is of course made in large lots so as not' to require frequent adjustment of the trimming saws.

The blank 5 is quickly fed past the rotary saws 71 and 71 by theL continuous sliding motion of the feeding rcross head 44 andthence is brought into operative en`y gagement with two rotary grooving cutters 81-81- which cut the molding grooves in the ends of the slats s and s. rlhese rotaryV cutters are disposed immediately behind the rotary saws 71-71 and are mounted on vertical arbors 82, which have bearing support in yoke-shaped frames 83. Fach of these yoke-shaped frames hastwo parallel project-` ing arms 84 which rest on the cross timbers 34 and 35, and which are slotted longitudinally for the reception of the clamp bolts 85. By loosening these clamping bolts, it will be apparent that the two yoke frames 83 can be adjusted horizontally to separate the rotary cutters or to bring them closer together for the purpose ofchanging the spacing `between the cutters, for operation upon either length of slat, or for regulating the depth of cut in the ends of the slats. rllhe teeth of these cutters are preferably configured tolproduce a curved V-shaped groove in the ends of the blanks 7) so as to form the rounded bevels 23 along the end edges of the linished slat,

Flach rotary cutter disk is rigidly held between two collars 86, which are clamped over the reduced threaded'end of the arbor Each arbor' 82 is journaled in splitl bearings 88-88 on the yolre .ends of the frame 83, and the two arbors are belted together by a round belt 89 which tracks in sheaves 91 mounted on the arbor shafts intermediatethese bearings. The arbor of the right hand cutter 81, as rviewed in yFigure 12 also carries driving sheave 92, around which is trained the driving belt 93.' rhis driving` belt is extended back through the machine and is Vtwisted for engagement over a pulley. wheel 94 on the counter shalt 64 (Figure 6).

It is desirable that the rotary cutters 81- 81 be vertically adjustable in order to insure that the molding grooves formed thereby will be in the center of thevends of the blanks and in accurate alignment with. the lateral molding grooves 25. This vertical adjustment is provided for by the cap screws 101 which thread "up into bosses 102 'formed on the yoke frames 83. Each cap screw 101 has a short stud end 95 on which 1s seatedv a washer 96, ot fiber or other suitf able material. The liber washer 96 supports the lower end ot the arbor 82 and it will hence be apparent that by manipulating the cap screw the height of the rotary cutter can be adjusted as desired. A lock nut 103 secures the cap screwf101'in any adjusted position. Formedv integral with each boss 102 is an enlarged circular oilfchan'iber 104 whichy containsa reserve quantity of lubricant for lubricating the lower split bearing 88 and the thrust bearing aiiorded bythe end of the cap screw 101.

To prevent any possibility of the blanks Z; from jumping up above the cross-head 44 yor becoming otherwise displaced on the guide rails 39m either of the preceding sawing and grooving operations, two spring fingers 105 are provided adjacent the ro- I, tary saws Z1-71. rihe spring lingers press down rmly upon each blank as it is fed past. the sawing and grooving wheels and resiliently confines the blank in its proper position in front of the cross head 44. Two Ybowed springs 106 are provided for adding tension to the ends ot the spring lingers 105 to insure rm holding oi the blank Zi adjacentithe grooving cutters 81-W-81. spring linger 105 and its respective bowed spring 106 are secured in lapped relation von a block 107 on the back of the hopper 38. The motion of the reciprocating cross head 44 continues past thegrooving cutters 251-81 and as a final step in its operation delivers the trimmed and grooved blank o Nonto a vertically reciprocable platen bar 112. The cross head 44 is made sutiiciently long so that at this period the rear end of theV cross head is still closing the bottom of the hopper 38 and retaining the blanks therein.

' The platen bar 112 is mounted on a plate 113 by'bolts 110, the plate 113 in turn being mounted on two reciproca-ble rods 114, as bestl shown in Figure 12. The upper ends of the rods 114 thread into bosses 115 formed integra-l with the plate 113, and are locked Each therein by the lock nuts 116. The lower ends ot' the rods 114 carry tappets 117 having bifurcated ends in which are pivoted the tap-pet rollers 118. r1`hese tappet rollersare arranged to cooperate with lifting cams 119V which are keyed to a'cam shaft 121. The tappets are retained in vertical alignment with the cams and cam shaft by guide plates' 122, which, as shown on the detail view in Figure 13 are provided with slots 123 enibracing the cam shaitt 121. rlhe guide plates are extended up and are bent across the tops of the tappets 11.7 where they are secured by the threaded engagement of the lifting rods 114 in the tops ot' the tappets. Lock nuts 124 lock the guide plates and tappets in the lifting rods 114. The ends of Vthe lifting rods 114 are threaded in opposite directions whereby the height of the platen bar can be readily adjusted by loosening the lock nuts 116 and 124 and rotat ing the rods 114. Referring to Figure 14, the ends oi the plate 113 are bentupward and outward in the form o't spring arms 108 which are fastened at their ends to the traine of the machine by screws 109. The sp arms 108 guide the vertical reciprocation ot the platen bar 112 and also pro-r vide spring means tor retracting the platen bar downward and away :trom the boring mechanism which we shall presently describe. ln the latter function, the spring arms are assisted by tension springsA 111. These springs lock into eyes inthe laterally lbent portions oi the guide plates 122 andv haveY attachment at their lower ends to a cross strip 120, which is secured to the cross timbers v The cam shatt- 121 has bearing support in a plurality of bearings 125, mounted on the cross timbers 35 and is driven at a relatively slow speed through a sprocket 126 over which is trained'a driving chain 122'.v As shown in Figure 1.7, the chain 127 is eX- tended up around a sprocket 128 on the countershaft 49, and over a sprocket 129 on a stub shaft 131. The sprocket 128 is driven by the slow speed countershaft 49 and thus drives the other two sprockets 126 and 129. The sprocket 129 connects through fthe shaft 131 and through series of gears with can rier chain for carrying the blanks Z) Vfrom the boring mechanism to the slitting mechanism, as we shall presently describe.

Referring` again to Figure 9, it will be noted that the platen bar 112 is guided in. its vertical reciprocal motion between the plate 41, and'alongitudinal rail 132, ot channel section. 'In the channel Joi'mation` ofthe rail 132 lies a carrier chain 133 hav- Amotion ol' the platen bar 112.

Referring now to the boring Voperation, the plurality of water circulating holes 18 and the nail holes 19 are all bored simultaneously in the blank 7) by one reciprocal y 11s shown best in Figures 9 and 14, the plate bar 112 is aligned directly beneath a row ot closely grouped bit stocks 136 which carry the large borim); bits tor boring' the water circuybiting-'holes 18. Each bit stoel; 136 has an independent driving shaft 138 which is driven by a bevel pinion 139 on the end `thereof meshing with a bevel pinion 141 on the main d iving shaft 142.

liach bit stock and shaft 189 is journaled in die extending hub portions 1423 anc 144 of an independent yolrevshaped trame 145. The series ot yoke frames 145 are all adjustably supported on announting plate 146 which is bolted between the two central upriejhts 33 as shown in Figure 7. The mounting plate 146 is formed with a longitudinal slot 147 through which pass the series ot 'outermost pairoiC 'bit stocks 154.

clamping bolts 148, one for each yoke traine 145. On the rear ot each yolre trane 145 are Tformed guiding tlanges149 which embrace the'horizontal edges et the mounting' plate and guide the yoke trame in horisontal adjusting motion along the plate 14a. By the above arrangement it will be apparent that the spacing between the f' stocks can be readily adjusted, and that a numbe.' oi bit stocks can be easily increased or diminished to change the number oit water circulating holes. As we have previously described, the cover slats s have one less hole than the cylinder slats a, and it will hence be apparent from the foregoing how'thev entra intermediate bit stoclris removed and replaf d 'lor boring either type ot slat. n

The nail holes 19 are bored by two relatively small Vbits 152 which are disposed at each end of the row oic bits 187 and are laterally spaced one on each side ot the line ot bits 137 asclearly shown in Figure 15. At the lett hand end the two small bits 152 are adapted orinsertion into either o1' two pairs o1 parallel bit stocks 153 and 154 aligned across the end of the line of bits 137. At the right hand end ot' the row the two small bits 152 are always retained in the two spaced stocks 153. For boring the nail holes 19v in the relatively short cylinder slats, the lett hand bits 152 are inserted in the innermost pair of bit stocks 153, and tor boring the nail holes 19" in the longer cover slats s the bits are inserted in the This is 'for the purpose of changing the spacing between the lelt hand nail holes and the. ad'- jacent water circulating yhole 18 for reasons concerned with the manufacture ot the cylinder covers. All three pairs oli bit stocks have short driving shatt's1156 which extend up through a supporting housing 157 ,which is screwed to the outermost yoke frame hub 143, as shown in Figure 15. These housings 157 preferably consist of two split housing sections which are secured together over the shafts 156 by the mounting screws 155, At the upper ends these pairs of driving shafts 156 carry pinions 158 and 159 respectively, the outermost pair of pinions 159 being elevated above and lapping over the innermost pair 158. The pairs of pinions 158 and 159 mesh with gears 161 and 162 respectively, which are rigidly securedk to the adjacent driving shaft 138. 1t will thus be apparent that the small bits 152 rota-te continuously with the large bits 157 and, that by merely changing the `small bits at the lett hand end of the row between the pairs of bit stocks 153 and 154, and removing or replacing` one of the intermediate bit stock trames 145, the boring mechanism can'be readily adapted to the boring of either type of slat.

To permit of adjustment in the spacing between the bevel gears 141 in accordance with the spacing adjustment between the bit stocks 136, thesev bevel gears are formed with integral hubs 164 which are slotted longitudinally ata pluralityof points' as indicated at 165, whereby the hubs can be rigidly clamped to the shaft 142 in any adjusted position by the contraction of semi-circular clamping members 166. The main driving shaft 142 is journaled in bearings 160-160 mounted on upwardly extending legs formed alt the ends of the mounting plate 146. The shaft 142 supports a beit pulley 163 on the end thereot`,'which is driven through a belt 167 extending down to a pulley 168 on the motor driven counter kshaft 64.

To prevent displacement of the blank b from the platen bar 112 when the latter carries theblank up into engagement with the boring bits, thereare provided two spring fingers 171 (Figures '6 and 9),.disposed directly above the platen bar 112 and aligned between the bits 137. These spring lingers are spaced from the platen bar just sulliciently to resiliently hold the blank on the platen bar. .The lingers are extended up and over the top ot' a reciprocating con fining bar 172, down behind backing plate 173, and under the channel rail 132 where the ends areseeured between `the bosses 115 and lock nuts 116 on the under side of the platen bar 112. TheV spring 1ingers171 consequently have simultaneous reciprocal motion with the platen bar 112. A plate 174 over and bolted to the conlining bar as inien Between the two side members 178 is pivoted a roller 182 which is adapted to cooperate with a` cani 183 on the Vcam shaft 121. VThe depending arm 176 is preferably Vriveted between the spaced side inenibers 178 and has a transverse pin 184 projecting therethrough to which the straps 175 are secured. .A tension spring 185 connection with the end of the oscillating arm 177 tends to retain the confining bar 172 in its lower- `most position. The function of the bar 172 Vis to prevent the blanks from jumping the do s 134 on the carrier chain 133.

1he Vturning of the cani 183 and the length of dwell thereof isso arranged that the bar 172 will descend into proximity to Athe earrierehain 133 immediatelyI after a bored blank has been discharged onto the chain from the platen barl 112; and will remain in descended position until the carrier chain has conveyed the blank into .tie enclosed passageway or tunnel 206 for slitting, which latter operation we shall presently describe. This timed relation is such that the bar 172 will be raisedand in the clear when the next succeeding blank is discharged from the platen bar 112 onto the carrier chain 133.

The bar 172 moves upwardly just after the completion of the boring operation on the platen bar and just prior to the discharge of the blank therefrom so that there will be ample room to move the blank in under the confining bar. This upward ino'tion of the confining bar 172 is utilized to operate a compressed-air jet for blowing the Vwood pulp produced'by the boring bits from off Y the blankoand from off the platen bar and adjacent parts. Referring to Figures 8 and 11, it-will be noted that on the stationary plate member 174 is mounted a small air valve 220, which is supported on the plate member 174 by a bracket extension V221. A sinall pipe 222,V extending from a source of compressed air, connects with the intake end of the. valve 220. The Vdischarge pipe 223 is extended to the right and is bent around to discharge back along the top of the blank and along the platen bar to blow the wood pulp out fi'omtherlefthand end of the inachine. The valve 220 is operated by a button plunger 224D which projects down in position for'- engageinentby the Yconfining bar 1727 when the latter rises after the boring operation. The saw dust and wood pulp from theremaining sawing and grooving operations is preferably removed by the provision of suction hoods adjacent the cutting tools, as is well known in the art. Y

The operations of boring the blanks Z) and discharging them from the platen bar 112 are as follows:

The reciprocating cross head 44 irst delivers the blank o upon the platen bar 112, forcing the blank in under the upturned ends of the spring lingers 171. The blank is centered properly upon the platen bar in a manner which we shall presently describe. rllhe platen bar is now raised under the action of the cams 119, andthe blank I) is brought into engagement with the continuously rotating boring bits 137 and 152. It will be noted that the upper surface of the platen bar is formed convex (Figure 9) so as to back up the concave under surface of the blank o and prevent the bits from splitting the saine. The platen bar 112 is of course provided with a plurality or" bit holes 184, Figure 8,*for receiving the ends of the boring bits. Upon descent of the platen bar 112 the blank Z) is stripped from the boring bits by the spring lingers 171. C'oncurrently with the time the platen bar has descended to its lowerinost position, as shown in Figure 9, the cross head 44 has practically coinpleted the sawing and grooving operations of the next succeeding blank; and at the completion of the strcke of the cross head 44, this latter blank is thrust against the blank on the platen bar, thereby displacing the same and thrusting it over onto the channel rail 132. The displaced blank is thrust up against the backing plate 173 which forms a guide wall for Vguiding these blanks in their endwise transit on the carrier chain 133.V The backing plate 173 is so spaced-from the line of bits 137 that when the displaced blank is thrustY up against this saine plate the blank will function as a positive stop for limiting the motion of the succeeding blank and centering it on the-` platen bar directlyi under theA line of bits 137. This operation recurs with Y each blank upon being displaced from the platen bar, and thus each blank after boring functions asa positive stop for centering the next succeeding blank upon the platenk bar .112.

VThe reciprocating cross head 44 is adapted i to feed each blank onto the platen bar with a yieldable thrusting motion which willplaee the two blanksunder a slight compression but not of sufficient degree to mar thel edges ofthe blanks'. To this end there is interposed a resilient connection Vin the connecting rod 46, the detailsfof which connection are illustrated in F igure'V 10. YA sleeve-like spring housing 186 is interposed inthe connecting rod7 this housing having a threaded stud 187 tapping into the upper portion of the connection rod 46. The lower portion of the connecting rod 46 is guided for motionin the spring housing 186 by the guide nut 188 which threads into and closes ofof the machine. This enclosed passageway the lower end of the housing 186. The end of the lower connecting rod section 46l is provided with a collar 189, and conlined between 'this collar and the guide nut 188 is a compression spring 191. The throw of the cross head 44 ispreferably adjusted so that the two blanks are thrust aga-inst the backing plate 173 slightly before the cross head reaches what would normally be the end of the stroke, if its motion were not limited by the blanks, whereby the spring 191 is compressed to the proper degree to insure centering of the rearmost blank on the platen bar. The throw ofthe cross head 44 can be readily adjusted by the shifting of the pivot bolt 192 in the radial adjustment slot 193, provided in the crank wheel 48.

Referring again to the carrier chain'133, as shown in Figures 8 and 12, it will be noteoi from the direction arrow that the carrier chain travels from in the rear of the boring mechanism toward theA right hand end of the machine. Motion is imparted to the chain by a driving sprocket 194, over which the chain'is trained. From the sprocket 194 the chain extends down through the frame and is trained over small pulley wheels 195 secured to the cross timbers 35. From there the chain is passed up over an idling sprocket 196 which has support in a bearing bracket 197 on they frame of the machine, and is from there extended back through the channel rail 133 past the platen bar 112. This chain is preferably of ordinary link construction provided with equidistantly spaced dogs 134 secured to the links for carrying the blanks ZJ along the surface of the channel rail 132. These dogs are preferably so spaced and the chain is so timed that upon discharging a blank from the platen bar 112 onto the channel rail 132 the blank is allowed to remain momentarily before it is engaged by a dog 134, so as to enable the blank to act as a stationary stop for centering the next succeeding blank under the boring bits, as has been previously described.

The driving sprocket 194 is mounted on a short shaft 198 which has support in two bearing blocks 199 which are carried on frame extensions 201. lait tle end of the shaft 198 is mounted a bevel gear 202 which meshes with a second bevel gear 203 mount ed on the stub shaft 131. The shaft 131 has support in a bearing 204 and'is extended back under the top of the machine where it carries the sprocket 129 (Figure 17), which, as we have previously described, is continuously driven through the chain 127 from the countershaft 49. y l

Referring to Figures 8 and 17, it will be noted that the carrier chain 133 passes through a rectangular enclosed passageway 206 extending from adjacent the platen bar 112- to a discharge point out beyond the end comprises two side members 207 projecting up above the channel rail 132, and the top plate 208 which closes oli. the top of the passageway. Projecting into the passageway through an opening 209 in the side thereof is a rotary slitting saw 211. This slitting saw is disposed exactly in the center of the vertical dimension of the passageway soas to slit the blank into two complete slats along the median plane of the moulding grooves 25. The rotary slitting saw 207 is mounted on an arbor 212 between collars 213. The arbor 212 is mounted in bearings 214-214 on the yoke shaped frame 215. This yoke shaped frame 215 is of substantially the same construction as the bearing frames 83 for supporting the arbors of the rota-ry cutters 81-81, and similarly thereto the frame 215 is arranged to-be horizontally adjustable on the frame of the machine to allow adjustment of the horizontal position of the rotary slitting saw in the passageway 206. The arbor 212 is furthermore made vertically adjustable by the provision of the cap screw 216 and a lock nut 217 so as to insure the exact centeringvof the rotary slitting saw in the passageway 206. The slitting saw 211 is driven by a belt pulley 218 which is carried on the arbor 212 between the bearings 214. A driving belt 219 encircles the vpulley 218 and is extended out through the rear of the machine, where it is twisted horizontally and is passed around a pulley 229 on the counter shaft 64. A spreading or separating blade 230 is bolted to they upper surface'of the machine and projects into the passageway or tunnel 206 at the rear of the slitting saw 211. This blade separates the finished slat units during the sawing operation and prevents them from binding on the saw 211.

In the operation of the slitting mechanism the blanks are fed past the slitting saw 211 by the positive feeding action of the dogs 134 in thecarrier chain 133. These dogs are suiiiciently short so as to amply clear the slitting saw 211. The blank Z) sub stantially fills the passageway 206 and hence is confined against any deviating motion which might produce an irregular saw cut. Upon completion of the slitting operation the finished slats are discharged from the end of the passageway 206 into a receptacle or the like at the end of the machine.

@ther arrangements and constructions are kalso possible which would produce the vari-r ous features of our invention, and we do not,

shown.

le claim: 1. Tn a machine of the class described, the

'combination of a substantially horizontal guide member forming a working surface,

rotary saw mechanism, rotary cutter meehanism, feeding means for receiving` the blanks and feeding them past said rotary mechanism and said rotary Vcutter mechanism, said feeding means having motion on said guide member, each of said blanks being of the sizeof a plurality of the completed slats, a plurality of boring bits adapted to engage each blank, said feeding means delivering the blanks to position for operative engagement with said boring bits at the completion' of the sawing and cutting opera-V tions, and slitting means for slitting each of said blanks into the plurality of` completed lath units, said rotary cutter mechanism and said slitting means operating in a plane parallel to said working surface and in the same plane with each other.

2. ln a machine of the class described, the combination of a pair of spaced rotary saws, a pair of spaced rotary grooving cutters, multiple boring mechanism, slitting mechanism, feeding mechanism, guide means therefor defining a working surface, said rotary grooving cutters andv said slitting mechanism operating in a plane parallel to said working surface and in the same plane with each other, said feeding mechanism operating to feed the blan is between said pair of rotary saws for trimming the ends of said blanks, and to feed the trimmed blanks between said pair of rotary grooving cutters for cutting grooves in the trimmed ends of said blanks, said feeding means placing each blank in association with said multiple boring mechanism,'means for producing relative motion between said multiple boring mechanism and said blanks for borinoa plurality of holes therein, and means for feeding each blank after the trimming, grooving and boring operations to said slitting Vmechanism for cutting said blanks into a plurality of complete Slat units.

8. In a machine of the class described, the combination of a pair of rotary trimming saws, a pair of rotary groovingcutters for cutting grooves inthe end edges of the blanks after trimming a hopper for receiving the blanks, an oscillating slide adapted to receive the blanks from said hopper and feed the same successively past said trimming saws and grooving cutters-multiple boring bits, a reciprocating working surface co-operating therewith, said oscillating slide discharging the trimmed and grooved blanks ninto'operative relation withsaid reciprocating working surface, and means for reciprocating said working surface in timed relation with the oscillation of saidslide, wherebyone continuous stroke of the oscillating slide will carry the blanks through the trimming and grooving operations and place them singly on said working surface as it moves into position to receive the advancing blank. Y

4. In a machine of the class described, the combination of a rotary trimming saw, a reciprocating slide for feeding the blanks into operative engagement with said trimming saw, multiple bit boring mechanism for boring a pluii'alityof holes in each of said blanks, a reciprocating platen bar adapted to receive said blanks and move theV same into operative engagement with Vthe boring mechanism, said reciprocating slide having a full stroke motion past said trimming saw and dischargingy each individual blank upon said reciprocating platen bar by a single motion of said slide.

5. na machine of the class described, the combination of plurality of rotary trimming saws for trimming the blanks, a horizontally reciprocating cross-head Vadapted to receive said blanks and feed the same by a continuous motion-past said trimming saws for operative engagement therewith, multiple bit boring mechanism for boring a plurality of holes in each of said blanks, a reciprocating platen bar associated therewith, said reciprocating cross-head delivering said blanks upon said platen bar at the completion of its operation, said platen bar adapted to bring said blanks into operative engagement with said boring mechanism, and mechanism for cutting Veach blank into a plurality of complete slat units at the completion of the trimming and boring operations, last said mechanism being disposed in a plane parallel to said cross head.

G. ln a machine of the class described, the combination of a pair of spaced rotary trimming saws for trimming the ends of the blanks, a horizontally reciprocating cross head, means for feedingV said blanks into ,position for motion with said cross head,

said cross head adapted to feed said blanks between said trimming saws, multiple boring bits for boring a plurality of holes in said blanks, a reciprocating platen bar associated therewith, said cross head having a continuous motion from said feeding means past said trimming saws and delivering said blanks u aon said platen bar at the completion of the trinnning operation by a single `motion of said cross head, the reciprocal motion offsaid platen bar bringing said blanks into position for engagement by said boring bits.

7. ln a machine of the class described, the combination of a substantially horizontal guide member forming a working surface with a reciprocating cross head mounte on said guide, said cross head adapted to Vhave a single motion through a predeterhaving movement to advance a blank to said drill head, said movement being timed so that said platen bar will be lowered to receive the advancing blank aitter being; passed through said trimming saws by' a single motion of said cross head, and means VJfor slitting the blank into a plurality ot' slats, said means mounted in a plane parallel to said Working surface to slit said blanks substantially in their medial plane.

S. ln a machine ot the class described, the combination ot a rotary cutting grooves in the ei'lbes of the blanks, a traveling); feeding member 'for receiving the blanks and feeling each blank past said grooving utter operative engagement therewith, boring` mechanism tor boring holes in said blanks, each blank being ted into operativ association With said boring mechanism after said grooving operation, means tor relatively moving said blank and said boring; mechanism 'for boring holes in said blank, and cutting; inechanis'nii receiving the blanks from said boring mechanism and opcratingg to divide each otn said. blanks into a 'plurality oi? slat units, said cutting,` mechanisin cutting; said blanks, in the plane ot the grooves tornio-d in the edges thereof.

9. ln a 'mac line off the class described, the combination o'f a rotary groovingn cutter tor termin,Qv bevels on the blanks, an oscilla@ingr` slide member tor receiving; the blanks and 'teedino' the blanks by continuons motion past said ,fgroo'a'inn' cutter for operative engagement therewith, multiple bit boring .mechanism ttor boring holes in said blanks, a

recipro-catino,` 'platen bar 'tor moving said blanks into operative engagement with said boring mechanism, said oscillating slide delivering' the grooved blanks onto said reciprocatino' n ,ten bar, and cutting;- mechanism :tor dividing' each ot said blanks on the line oit the bevels in said blanks.

l0. ln a machine ot the class described, the combination ot a pair of spaced rotary groovinp; cutters, a reciprocating' cross head adorned to receive the `blanks and 'leed the same betivee` said grooving cutters for oiierativ@ engagement therevvithn multiple boringv bits 4,tor boii'ingi,r holes in said blanks, a recijorocatingplaten bar associated therewith., id head delivering said blanks upon said platen bar unen completion ot the groovingi; operation, the reciprocal motion ot said blaten bar moving said blanks into `operative engagement with said boring bits,

and slitting mechanism receiving'tbe blanks from said platen bar and slitting each of said blanks in a plane transverse to the bored hole therein.

ll, ln ya machine ot the classl described, the coi'nbination of guideivays, a reciprocatin' cross head moving on said guide- `ti i waysM a hopper adiacent onev limit ot travel ot said cross head ttor feeding the blanks .in trent oit said cross head, said rooving cutter for guideivays forming a Working surface for the blan ts, spaced rotary grooving cutters disposed on each side ot the course ot' travel livering` said blanks onto said platen bar at the completion lieA groovingl operation, slitting n'iechanism tor slitting the blanks, and means 'lier feeding 'the blanks to said slitting mechanism on a line substantially transverse to the course ot travel of said blanks with said cross-head, said slitting nie-ans and said grooving cutters acting` parallelto said Working surta-ce and in planes parallel to each other.

12. lira machine otfthe class described, the combination of' a rotary trimming saw. rotar;7 groovin'g cutters, 4a reciprocating* slide having moti n 'past said trimming savv and greci-.ring cutters, said slide adapted to rece/ire the b anke and brin? thein into operative engagement With .id saw and with said cutters, inultible boring bits, a Working' surtace theretor, said reciiirocating slice discharging blanks upon sait Working' su, ace with single motion and 'Vf said boring bits and said working. surface for bori said blanks.

ln a machine ot the class described,

the combination ot a pluralitv ot rotary trimming saivs, a nlura ity of rotary aroovin;r cutters 'for cnttingr beveled grooves in the end coges ot the blanks, means tor slittine' said l :inks tbrongh said larooves in a -plane substantially 1parallel to the plane oit said rotary groovinn' cutters, a recinrocat- 05 ing' slide or past said and said cutters, toril'eedino' the blanks Ainto position for motion ivitn said slide, said saves and said cutters' operatingrnnon said blanks durin their movements bv said slide, multiple boi or; bits tor boring holes in'said blanks, a reoinrocating' platen. bar cooperating with l boring;V bits*A saidslide deliver- Vthe plane of seI eration for division into a plurality ot sla-t units reciprocatingr cross head moving' between said saws and said cutters, means for feeding the blanks into position for motion with said cross head, a

dans for obtaining relative motion between i Y platen bar plurality ci boring bits, and a reciprocating for moving said blanks against said boring` bits7 said cross head delivering said blanks upon said platen bar at the conipletion of the sawing and grooving operations. Y

. l5. ln a machine ofthe class described, tle combination of a pair of horizontal guide rails, a reciprocating` cross head moyon said guiderails, a ceding` hopper adjacent one limit of the stroke said cross head, a plurality of vertically disposed borbits adjacent to tlie other limit cic said roke, a vertical i'eciprocating platen bar st aligned with said boring' bits, a pair of spaced rotaryV trimming" saws ydisposed one on each side of saidguide rails, a pair of spaced rotary greeting cutters disposed one Y .on each side of said guide rails for cutting grooves in bctli end edges ot the blanks, means in the plane ci said rotary grooving cutters for slitting said blanks through said grooves which deiine the plane of separation tor division into a plurality of slat'units,y andadiustable mounting` means Yfor said trimming saws and said groovinoj cutters permitting spacing adjustn'ient between said saws and said cutters. Y

16. ln a machine olf the class described, means 'lor cutting the blanks to length, means Vtor grocving said blanks, means for boring' said blanks, means for slit ing said blanks into slat units after the completion ot said cutting,groovingand boring;` operations, and feeding; means for transferring said blanks between si.

,d several means.

v l r. in a machine et the c ,i L means for trimmingV the ends oi tit-e b" i to length, means for groot-fina' the oi said blanks, means tor simultaneously boriig a plurality ot' water circulat holes in e Y 1 I, a r

d blanks, means ior Vslitt i n' said blanks i 1 *ci inse complete sl units after tlie c misgo aid triinmin eroovina and borin ope aticusanr teediiia` means Ylor transferri said blanks between dilierent operating' means.

18. ln machine oi" the class described` rotaryY saw means for trimming' tlic ends el the blanks to sw length. multiple bitboring; mechanism simultaneously boi-,L

for

plurality of Water circula holes in blanks, a. rotary slit ing' san lor slitting' sii-d blanks into units alter the completion o'f said trimmings' and boi-i operations, and feeding; means for transfer said llanks between said different @parat means.

19. In a Vmachine of tlie class described, rotary giooving; cutters lor greeting the edges of the blanks, a l l .rality ci boring bits for simultaneously b `-ing plurality ci Water circula-ting` holes iii blanks, a. ro.- tary slitting;y saw for slitting said blanks into in said bl into complete -slat units alter the comple ci trimming, nrocvii f and bor' erations,y an oscillating` s.ide Jor blanke between said 'triminina, reorina and boring' means, andV a continuousllv lmovi carrier member lor tee-fling` si i S0 blanks lo said slitting means.

2l.' ln `a machine of the class described. rota"r triini saws lor trimmn oit the llanlrs to slat length., rctai ine cutters for ,erecting tlievends of d" Alis, ni-.ltiple boring' for neouslr Loring a idurali-'-y lf/iter circ latine' holes in saitbl uks, a rotary slitting .cr slitting` into con' units alter tlie cininletion of said l) arc-ovina' and boring operations.

ciprccatiiigi cross head `tor feeding' f blanks to said trimming' saws and to saill groovin cutters, a reciprocatii u.. co-operating 1with said boring' bitf Y' "i 'innsaid blanks into'operatire engagenieuy therewith, said reciprocating' cross head d i cli-Meina said blanks onto said platen ban an continuously moving` uniedi ectional lon ca s to said slitting` saw, said discharged om said platen carrier element.

in machine or" the c element for feeding said'blanks blanks being rrr onto said said blai a reciprccatin@ 'slide receiving' said b niks brinaine' rhein ngagjeinent with said en.

, boring` nieclian l-lU l Witli'sci ciprocatino' si past said cutti by to direct` L i blanks against said boringa bits, VleeL means Jfor periodically feedingn said blank; sait. platen b=r, means whereby eaclL blankl properly centers the next Succeeding id `conveyor means properly centers ln blank on said platen bar, and .conveyor means -for receiving each blank from said platen bar aitter the boring operation.

24. ln a machine oi the class described, the combination of a plurality of boring bits, a reciprocating' platen bar adapted to receive the blanks and move thein into position Vlior, engagement by said boring bits, a hopper, a reciprocating cross head adapted to receive the blanks from. said hopper and :teed thorn onto said platen bar, a connectif member operatino,` to reciprocate said cross head-` conveyor means for receiving each blank from said platen bar er the borir operation, stop means 'for limit t. i ot said blanks whereby the blank on next succeediiipj blank on said platen bcv andren nt means in said connecting,` in ber for causing: said-cross head to resi-.lientl.f"l"`orce each blank against the precedinfl blank on said conif'ei/or inc., Y

25. ln a machine of the classrdescribed, the combination oi. a pair of spaced rotary trimming saws for trimming` the ends of the blanks, a pair of spaced rotary gro-Dying cutters ior groovinrr the ends oil the blanks, a hopper, a reciprocating cross head adapted to receive 'the blanks from said hopper and iced the same between said trimming saws and said ia'roovina" cutters, crank means for reciprocating said cross head, a connecting rod between said crank means and said cross head, a resilient spring connection interposed in'said connecting rod, multiple borbits for simultaneously boring` a pluralityT ot Water circulatingv holes iii said blanks, a reciprocatinrrg` platen bar cooperating' with said boring' bits moving said blanks into engagement therewith. said cross head delivcrine'Y said blanks onto said platen bar, stop means operatingto limit the motion of said blanks and properly position the same on said platen bar, said resilient spring conncction operatinp,` through said crosshead to resiliently press said blanks against said stop means, a rotary slitting saiv for slitting' said blanks into complete Yslat units, and a carrier for conveying' said blanks to said slitting saw, said blanks being discharged fromV said platen bar onto said carrier.

26, ln a machine et the class describes., the combination oi" plurality oi" boring bits, a reciprocable platen bar for moving the blanksinto and out of operating relation with said boring bits, oscillating feeding; means i'ior feeding ythe blanks onto said platen bar, conveyor means tor receiving the ybored blanks troni said platen bar, and

means Wherebj,v each succeedingblank disilaces the preceding blank trom said platen bar to said conveyor meansailer the saine has been bored, and each precedingblank properly centers the next succeeding blank on said platen bar.

27. ln` a machine oi the class described, the combination ot mechanism for trimming and boring` the blanks, a rotary saw for cut- .ting the blanks into a plurality of slatunits and means for confining said blanks against by'said rotary saw.

28. ln a machine ot theclass described, the combination with a Woodworking mechanism for shaping` individual blanks to define a line of separation-along their end displacement during; the cutting operation Vedges for subsequent division into plurality or" slat units, oit a rotary slitting' saiv, and means for causing said blanks to approach said saw with said line of separation in resister withl the cutting edge of said saiv.

29. ln a machine or' the class described the combination Vot mechanism' tor trimming' and boring the blanks, a rotary slittino; san7 'for slitting the blanks into complete slat units, an endless chain` fory transferring said. blanks from said .i'imingV and boring mechanism, lugs on said chain for feeding' the blanks past said. sai/v, said chain moving under sain saw, and a tunnel chute enclosing said chain and said sare tor coniining said blanks.

3G. The method ci. makiiigrivashing inachine cylinder slats and the which coini*orin bevels on the iinished boring'r holes,

in theblank, andY then cutting' the blank in its medial plane to form plurality of coniplete slat units.

itc

los

32. The method of makina` Washing inai chine cylinder slats and the like which coinprises taking a blank substantially the size of tivo iinished slats, trimming' the blank down to the length or the Vfinished Slat. grooving' the ends of the blank to form bei*- sled edges on the finished slat, simultanei y ously boring plurality ot' Water circulating holes and a plurality of nail holes through said blank and then slitting, the blank into two complete slat units.

33. The method of making cylinder slats and the like which comprises taking a blank having one dimension .of the finished slat unit, trimming the blank to a second dimension of the finished slat, simultaneously boring a plurality of holes iii said blank, and then slitting the blank in its medial plane to form a plurality of complete slat units on plane transverse to the holes bored therein. y

,3e/In a machine of the class described, means for trimming the ends of elongated blanks to slat length, feeding means for feeding each individual blank, transversely into operative relation to said` trimming mea-ns, means for slitting the blanks into complete sla-t units, said slitting means acting parallel to said feeding means, and feeding means receiving the blanks from said first feeding meansforrfeeding said blanks tosaidslitting means, said slitting means vactinop in a 1alane arallel to said iirst feed- Y e Y i ing means. 4 Y

35. In a machine of the class described, means fortrimming vthe blanks to one dimension of the finished slat, means for bor.- ing a plurality of holes insaid blanks, means for slitting each blank into a plurality of slat units'V in a single slitting operation, and feeding means for transferring said blanks between. said different operating means, said slitting means operating in a plane parallel Ato said feeding means.

36. In a machine of the class described,

means for simultaneously boring a plurality of ioles in the blanks, a reciprocating table for feedingthe blanks to said means, means for slitting each blank into a plurality of ciiinplete slat units on a plane transverse to the axis of said holes, and feeding means for transferring said blanks between said boring means and said slitting means, said slitting means operating in a plane parallel lto said reciprocating table.

Y 3T. ln Va machine of the class described, means for forming bevels on the blanks,

lmeans for slittingeach blank into a plurality of complete slat .units in a single simultaneousy slitting operation, and feeding means for transferring said blanks betvveen said beveling means and'said slitting means, said beveling means lying in a plane 4common to said slitting means.

Amoving toward and away from said feeding member for Vconfining said blanks in engagement with said feeding member.

3911i machine of the class described,

the combination of a plurality Vof bori g bits,

a reciprocating-platen bar adapted to receive the blanks ment Withsaid boring bits ing cam V'means thereon reciprocating saidplaten-bar, a rotary slitting saw, a carrier chain adapted to receive the blanks as they are discharged from said platen bar and feed them into engagement with said slitting saw, a conning bar movable toward and aivay from said carrier chain for confining said blanks in feeding engagement with said carrier chain, and cam means on said cam shaft for actuating said confining bar.

a0. ln a machine of the class described, the combination of a plurality of boring bits. a reciprocating platen bar for receiving the blank andV moving it into engagement with said boring bits, and `means for projecting a blast of compressed air Yalong the surface of said blank after the completion of the boring operation.

el. ln a machine of the classdescribed, the combination of a plurality of boringbits, a reciprocatingplaten bar for receiving the blank and moving it into engagement with said boring bits, acarrier chain adapted to receive said blank from saidplaten-bar, a movable confining bar for confining said blank on said chain, and an air valve operated by the motion of said confining` bar,

CARL F. ANDERSON. LESTER WV. KNAPP.

for movement into engage-V a cam shaft hav-V Certicate of Correction.

It is hereby Certified that in Letters Patent No. 1,464,020, granted August 7, 1923, upon the application of Carl F, Anderson, of Brookfield, and Lester 1V. Knapp, of Berwyn, Illinois, for an improvement in"WoodWorl ing Machines, an error appears in the printed specification requiring; Correction as follows: Page 1l, line 116, claim 31, for the Words its medial plane to form read the plum/ef of the grooves into; and that the said Letters Patent should be read with this Correction therein that the same may conform to the record of the ease in the Patent Otiee.

Signed and sealed this 9th day of October, A. D., 1923.

[SEAL] WM. A. KINNAN,

' Acting Uommissz'oner of Patents:

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